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1. A way of measuring the mass of a gem. One karat is 200 milligrams.

2. A way of measuring the purity of gold or platinum. One karat is 1/24 purity; that is, 24 karat gold is pure gold.

In both cases, karat can also be spelled carat.


A measure of the purity of gold. Pure gold is indicated by the label 24 karat. See also fineness.
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Hailee Steinfeld: Platinum and 10 carat diamond headband, and a platinum and diamond ring by Fred Leighton.
Mo'Nique - Everlon Diamond Knot - Pave Diamond Circle Link Bracelet, 15 carats
40-ct Stone Sells US$15,200 per Carat; 21-ct Stone Sells US$17,400 per Carat
6 carat blue diamond at the Cullinan mine in South Africa.
Based on values modelled on diamonds up to 9 carats, the +7DTC
Preliminary Capital and Operating expense estimates for the mining and processing of this revised resource shows that the property can be mined profitably over a mine life of 8 years, based on a production rate of 5,000 carats per month.
WWW's report indicates that it is highly unlikely that the average price for run of mine production from the four bodies would be less than US$76 per carat, based on current prices.
With these results, five of the six kimberlitic bodies in the Core Area have returned at least one diamond larger than two carats in size.
Historical diamond production by garimparos in the Chicoria Creek area, which straddles the adjoining Permit 213 and Mining Concession 214, has reputedly produced diamonds in excess of 200 carats in size.
Nicole Kidman - Natural green diamond necklace totaling 195 carats, set in pink gold designed specifically for the actress by Bvlgari and jewelry designer L'wren Scott.
Emmy nominee Debra Messing flashed a winning diamond look by Cartier featuring more than 90 carats of diamonds valued at more than $1.
Picking assay results from over 300 till samples confirm promising diamond potential on 33 CARATS EXTENSION.